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Cold weather and gas mileage

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Old 11-18-13, 04:06 PM   #1
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Default Cold weather and gas mileage

Its getting colder outside, and im starting to use the heat in my 06 IS. I was wondering, does anyone else see a significant change in gas mileage when using their heat? My tank average was sitting at 25.0 regularly, and now its around 23.5 with no real change in how I drive. Is this common?
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Old 11-18-13, 04:10 PM   #2
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that has something to do with the fuel blend.....
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Old 11-18-13, 04:18 PM   #3
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Originally Posted by kickin8 View Post
that has something to do with the fuel blend.....
Yep.

http://www.popularmechanics.com/cars...rence-13747431
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Old 11-19-13, 05:05 PM   #4
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Very interesting, I did not know that. Thanks!
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Old 11-19-13, 07:02 PM   #5
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yeah in the winter the fuel blend is different. thats why youll sometimes hear folks refer to it as "summer gas" and "winter gas". i dont think that should really really affect mileage, not in a major way at least
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Old 11-19-13, 11:30 PM   #6
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+/- 2 mpg for me, I think it's mostly due to cold morning start ups.
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Old 11-20-13, 01:01 PM   #7
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+/- 2 mpg for me, I think it's mostly due to cold morning start ups.
same here regarding the +/- 2. I was under the impression me running my heater had something to do with it as well, but I cannot say for sure.
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Old 11-20-13, 01:27 PM   #8
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we already take a mpg hit for using ethanol blends. we take a further hit due to winter blends.
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